Revelation 17:10-12

10There are also seven kings. Five have fallen, one is, and the other has not yet come. And when he comes, he must continue a short time.

11The beast that was, and is not, is himself also the eighth, and is of the seven, and is going to perdition.

12“The ten horns which you saw are ten kings who have received no kingdom as yet, but they receive authority for one hour as kings with the beast.